Claude Code v2.1.278
Claude Code v2.1.278 was released on .
Summary
Claude Code 2.1.278 now runs auto mode more efficiently by defaulting to server-side processing, which means no extra charges for most users. We've also added better visibility into how your auto mode is working. Check out the full details to see what this means for your workf...
Release Context
- This was the 223rd Claude Code release of 2026 tracked by Havoptic.
- It shipped the same day as Claude Code v2.1.277 (September 18, 2026).
- Claude Code: ships every 0.9 days — 32 releases in the last month.
Why it matters: Auto mode now runs free on the server.
Shipped around the same time
Within 3 days of this release, other AI coding tools also shipped:
- GitHub Copilot CLI v1.0.87 (September 21, 2026)
- Grok Build v1.0.40 (September 20, 2026)
- Grok Build v1.0.39 (September 20, 2026)
- Antigravity CLI v1.2.7 (September 19, 2026)
- Grok Build v1.0.38 (September 19, 2026)
Compare Claude Code: vs OpenAI Codex CLI · vs Cursor · vs Gemini CLI · vs Kiro CLI · vs GitHub Copilot CLI · vs Devin Desktop · vs Antigravity CLI · vs Grok Build
Release Notes
- Changed auto mode for Claude API and Enterprise users, and on Bedrock, Vertex, Foundry and gateways, to default to the server-side classifier, which does not charge for classifier overhead (CLAUDECODEAUTOMODESERVER=0 opts out on Bedrock, Vertex, Foundry and gateways); warns on billed fallback. See https://code.claude.com/docs/en/auto-mode-classifier-billing
- Added an Auto mode server row to /status showing whether this session's auto mode classifier runs on the server
Other Recent Claude Code Releases
- v2.1.276 (September 18, 2026)
- v2.1.275 (September 17, 2026)
- v2.1.274 (September 16, 2026)
- v2.1.273 (September 15, 2026)
- v2.1.272 (September 14, 2026)
All Claude Code releases · All AI coding tool releases on Havoptic